Fluid flow measuring

Details Fluid flow measuring Fluid flow measuring

1983-03-31

1985-02-12

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

Using differential pressure

7386167, G01F 146

Patent

active

044983476

ABSTRACT:
Means for ensuring the accuracy and reliability of fluid flow measurements when the fluid contains substantial quantities of entrained particulates, the measurements being taken with a pitot tube and a pressure-sensing means wherein the pitot tube is disposed in a duct through which the fluid flows and has at least one velocity pressure-sensing orifice facing the upstream direction of flow. The means includes a remotely controllable rotation means for interposing a barrier between the orifice and the upstream direction of flow when velocity pressure measurements are not being taken. In accordance with one embodiment the rotation means comprises a remotely actuated cover and in another embodiment the rotation means comprises means for rotating the tube whereby the orifice faces in a downstream direction when velocity pressure measurements are not being taken. There also is provided means for purging the orifice.

REFERENCES:
patent: 1255622 (1918-02-01), McFarland
patent: 1438811 (1922-12-01), Coyne
patent: 2488810 (1949-11-01), Easterday
patent: 2532316 (1950-12-01), Larkin
patent: 3327530 (1967-06-01), Lepird
patent: 3380298 (1968-04-01), Hanson
patent: 3518565 (1971-06-01), Dieterich
patent: 3638490 (1972-02-01), Buettner

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